I have an 06 1500 2wd with 5.3l. It had 3.23 in it I changed them to 3.73 now I have an abs light that won't go away. Bought hypertech programer to reset gear ratio but that has not helped either. Any suggestions??Mke

hmm i would check your wheel speed sensors. make sure the sensor didnt get bumped or something by the tire. they may just need a good cleaning. i dont think changing your gear ratio has anything to do with the abs system.

Do not change axle gear ratios on vehicles with anti-lock braking systems except in accordancewith the vehicle manufacturer's instructions.Vehicles with anti-lock braking systems may utilize sensors and tone rings within the axlehousings to ensure the functioning of the anti-lock brakes. Improperly changing the axleratios may defeat the anti-lock braking system. If changing axle ratios will require changingthe location of the tone ring on the ring gear flange relative to the location of the sensor inthe axle housing, contact the OEM manufacturer for specific directions and guidelines.

• Do not reuse or substitute ring gear bolts.If you reuse a ring gear bolt or substitute an inferior quality bolt, the bolt may loosen or backout of its threaded hole, causing severe damage to the axle gears and other components andpossibly resulting in a sudden "locking up" of the axle and loss of control of the vehicle.Always use new bolts specifically recommended for the application and install bolts usingproper tools and torquing to the proper specifications.

Ok, this weekend tore everything apart looked at all sensors. Adjusted rear brakes up. Put program bake to stock. And then reloaded. It does not show any codes. I drive it and about mile down road abs light comes back on check the code and it say there it not one but abs light says on. The abs sensor is in tail shaft of trans. I find nothing in book and visual on rear end that would have been damaged. Check wiring and grounds. I think I covered it. Still need help. Any suggestion? Going to call hypertech tonight. Mike

After several hours and quarter inch at a time change on programer no luck. Still says I have p0045 code. I do not have a turbo on truck. Brakes have 50 % life left. But I will try that next. Anyone help pleaseMike

Transmission and drivetrain related components. Discuss automatic and manual trans repairs and performance or talk about driveshafts or rear-ends and differentials. Diagnostics of 4-speed, 5-speed, or even 6-speed transmissions.